diff --git a/cura/LayerPolygon.py b/cura/LayerPolygon.py
index 577de9e40b..242bb25d56 100644
--- a/cura/LayerPolygon.py
+++ b/cura/LayerPolygon.py
@@ -69,9 +69,20 @@ class LayerPolygon:
 
         self._vertex_begin = 0
         self._vertex_end = numpy.sum( self._build_cache_needed_points )
-        
+
+    ##  Set all the arrays provided by the function caller, representing the LayerPolygon
+    #   The arrays are either by vertex or by indices.
+    #
+    #   \param vertex_offset : determines where to start and end filling the arrays
+    #   \param index_offset : determines where to start and end filling the arrays
+    #   \param vertices : vertex numpy array to be filled
+    #   \param colors : vertex numpy array to be filled
+    #   \param line_dimensions : vertex numpy array to be filled
+    #   \param extruders : vertex numpy array to be filled
+    #   \param line_types : vertex numpy array to be filled
+    #   \param indices : index numpy array to be filled
     def build(self, vertex_offset, index_offset, vertices, colors, line_dimensions, extruders, line_types, indices):
-        if (self._build_cache_line_mesh_mask is None) or (self._build_cache_needed_points is None ):
+        if self._build_cache_line_mesh_mask is None or self._build_cache_needed_points is None:
             self.buildCache()
             
         line_mesh_mask = self._build_cache_line_mesh_mask
diff --git a/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py b/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
index 0f46cc96bf..0d706f59b8 100644
--- a/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
+++ b/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
@@ -27,6 +27,9 @@ from time import time
 catalog = i18nCatalog("cura")
 
 
+##  Return a 4-tuple with floats 0-1 representing the html color code
+#
+#   \param color_code html color code, i.e. "#FF0000" -> red
 def colorCodeToRGBA(color_code):
     return [
         int(color_code[1:3], 16) / 255,
diff --git a/plugins/LayerView/LayerView.py b/plugins/LayerView/LayerView.py
index 6217ebdad2..c75c2eac0c 100644
--- a/plugins/LayerView/LayerView.py
+++ b/plugins/LayerView/LayerView.py
@@ -168,13 +168,21 @@ class LayerView(View):
 
             self.currentLayerNumChanged.emit()
 
+    ##  Set the layer view type
+    #
+    #   \param layer_view_type integer as in LayerView.qml and this class
     def setLayerViewType(self, layer_view_type):
         self._layer_view_type = layer_view_type
         self.currentLayerNumChanged.emit()
 
+    ##  Return the layer view type, integer as in LayerView.qml and this class
     def getLayerViewType(self):
         return self._layer_view_type
 
+    ##  Set the extruder opacity
+    #
+    #   \param extruder_nr 0..3
+    #   \param opacity 0.0 .. 1.0
     def setExtruderOpacity(self, extruder_nr, opacity):
         self._extruder_opacity[extruder_nr] = opacity
         self.currentLayerNumChanged.emit()
diff --git a/plugins/LayerView/LayerView.qml b/plugins/LayerView/LayerView.qml
index c2b2fb3559..ac85d6ccb2 100644
--- a/plugins/LayerView/LayerView.qml
+++ b/plugins/LayerView/LayerView.qml
@@ -15,7 +15,7 @@ Item
 
     Slider
     {
-        id: slider2
+        id: sliderMinimumLayer
         width: UM.Theme.getSize("slider_layerview_size").width
         height: UM.Theme.getSize("slider_layerview_size").height
         anchors.left: parent.left
@@ -151,7 +151,6 @@ Item
         anchors.verticalCenter: parent.verticalCenter
         anchors.top: slider_background.bottom
         anchors.topMargin: UM.Theme.getSize("default_margin").height
-        //anchors.leftMargin: UM.Theme.getSize("default_margin").width
         width: UM.Theme.getSize("slider_layerview_background").width * 3
         height: slider.height + UM.Theme.getSize("default_margin").height * 2
         color: UM.Theme.getColor("tool_panel_background");
@@ -203,7 +202,8 @@ Item
             id: view_settings
             anchors.top: UM.LayerView.compatibilityMode ? compatibilityModeLabel.bottom : layerTypeCombobox.bottom
             anchors.topMargin: UM.Theme.getSize("default_margin").height
-            x: UM.Theme.getSize("default_margin").width
+            anchors.left: parent.left
+            anchors.leftMargin: UM.Theme.getSize("default_margin").width
 
             CheckBox {
                 checked: true